Linux Basics

How do I use grep command in Linux operating systems? Can you give me a simple example of grep command? The grep command searches the given file for lines containing a match to the given strings or words. By default, grep displays the matching lines. Use grep to search for lines of text that match one or many regular expressions, …

How do I delete or remove a single file from within a tar ball under Linux operating systems? You can use the following syntax to delete a file from a tar ball:   tar --delete -f example.tar filename Example: Delete a File From a Tar Ball First, create a tar ball for testing purpose using the tar command, enter: # cd …

This is a series of lessons of “Basic Commands “ that focuses on command-line usage, in this serie you will learn the tools and tricks of the command line, which are in many cases faster, more powerfull, and more flexible than GUIprogram. Today in this part will show you the main commands to compress/decompress files using rar, bzip, tarball(tar) and gunzip. …

Many newcomers find it difficult use the find command at shell prompt under Linux. Find is nifty tool on remote server where UNIX admin can find out lot of information too. Find command can perform a search based on a variety of search constraints. It searches through one or more directory tree(s) of a filesystem, locating files based on some user-specified criteria. …

I’m using rsnapshot filesystem snapshot utility to make incremental snapshots of local and remote filesystems for 10 production servers running on RHEL 5.x system. The rsnapshot commands makes extensive use of hard links, so if the file doesn’t change, the next snapshot is simply a hard link to the exact same file. How do I use the rsync command to copy my the entire snapshot …

If you have been using computers for a while, whether you have been using Unix, Windows or Mac operating systems, you’re probably already familiar with the term shell. A shell is piece of software that is inbuilt into most operating systems which acts as an interface to the kernel and other software. Shells come in various shapes and sizes, but in …

Have you ever found when using yum to update your system or install new software that the downloads come at incredibly slow speeds or extremely slow to respond? There is a solution! When you run into the issue of slow download speeds via yum there are a couple of things you can do to ensure yum will select a new …